Perhaps you should try some spelling variations:
during crisis » during crises, housing crisis
boost during » roosts during, books during, boom during
huang ying » huang jing, huang ting, huang yang
land boost » can boost, land books, land cost
wang yang » wang yan, wang liang, wang yanling
how slum » how slow, how sun
how sub » how sun, flow sub

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((huang ying) or (wang yang)) land boost during crisis ((how slum) OR (how sub)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((huang ying) OR (wang yang)) land boost during crisis ((how slum) OR (how sub)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((huang ying) or (wang yang)) land boost during crisis ((how slum) OR (how sub)) ;*".